in other places, taking a nap. we know that people that take a nap at least five days a week have a third less heart disease problem than people that don't take a nap. it is 15 days to unwind the stress. >> i would love to be able to do that. >> it is hard, but there are things you mentioned, as well. i found it fascinating. this idea in investing in your friends, what did you mean by that? >> there are two important aspects, we know the happiest people in america are interacting face to face, six hours a day. so we evolved to be interactive creatures, so the health behaviors are as infectious as catching a cold or the flu, so you look at the blue zones. they were not on diets. the people were not in exercise programs but they were either pro actively, or they were born into a group of people that supported the right habits. >> do people take care of each other more so and encourage each other to eat better or go to the doctor? what is it about that interaction that is so preventible or helpful? >> so we live in a